Consul服务注册与发现

单机版

1.Consul简介

Consul官网

Consul是一套开源的分布式服务发现和配置管理系统，由HashiCorp公司用Go语言开发。

提供了微服务系统中的服务治理。配置中心控制总线等功能。这些功能中的每一个都可以根据需要单独使用，也可以一起使用以构成全方位的服务网络，总之Consul提供了一种完整的服务网格解决方案。

它具有很多优点。包括:基于raft 协议，比较简洁;支持健康检查同时支持HTTP和DNS协议支持跨数据中心的WAN集群提供图形界面跨平台，支持Linux、Mac、 Windows。

1.1能干嘛？

1.2 Consul下载地址
1.3 怎么玩？
中文版教程

2.安装并运行Consul

2.1官网安装说明
官网安装说明
mac系统安装Consul见
mac安装brew和Consul

3.服务提供者

3.1新建Module支付服务provider8006
cloud-providerconsul-payment8006
3.2修改pom.xml

<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>com.zhang.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

3.3创建application.yml

#####consul服务端口号
server:
  port: 8006

spring:
  application:
    name: consul-provider-payment
####consul注册中心地址
  cloud:
    consul:
      host: localhost
      discovery:
        #hostname: 127.0.0.1
        service-name: ${spring.application.name}

3.4 主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8006 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8006.class,args);
    }
}

3.5 controller类

@RestController
@Slf4j
public class PaymentController {
    @Value("${server.port}")
    private String serverPort;

    @RequestMapping("/payment/consul")
    public String paymentConsul(){
        return "springcloud with consul: "+serverPort+"\t"+ UUID.randomUUID().toString();
    }
}

4.服务消费者

4.1新建Module消费服务order8006
cloud-consumerconsul-order80
4.2 修改pom.xml

<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.zhang.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

4.3 创建application.yml文件

###consul服务端口号
server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
###consul注册中心
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        #hostname:127.0.0.1
        service-name: ${spring.application.name}

4.4 主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class OrderConsulMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderConsulMain80.class,args);
    }
}

4.5 配置Bean


@Configuration
public class ApplicationContextConfig {

    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

4.6 controller

@RestController
@Slf4j
public class OrderConsulController {
    public static final String INVOKE_URL = "http://consul-provider-payment";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/consul")
    public String paymentInfo(){
        return restTemplate.getForObject(INVOKE_URL+"/payment/consul",String.class);
    }
}